Bitcoin Z is a cryptocurrency that was created in early 2018 as a fork of Bitcoin. It uses the same SHA-256 algorithm as Bitcoin, but with different parameters. The aim of Bitcoin Z is to be a more decentralized, secure and private version of Bitcoin. Unlike Bitcoin, which is controlled by a small group of developers, Bitcoin Z is controlled by the community. This means that anyone can make changes to the protocol and there is no central authority.
Bitcoin Z also has a smaller block size and uses a different mining algorithm, which makes it more ASIC-resistant. This means that it is more accessible to hobbyist miners and is less susceptible to centralization. One of the key features of Bitcoin Z is its privacy-focused transaction system, which uses zk-SNARKs to hide the sender, receiver and amount of each transaction. This makes it much more difficult for third parties to track or censor transactions.